A patient was operated for a contained rupture of an aortic aneurysm t
hat appeared to be infected with Haemophilus influenzae type b. Report
s on this species as a cause of infection and rupturation of an athero
sclerotic aneurysm are extremely rare and we therefore describe this c
ase. Apparently the risk of bacteraemia and the possible effects of it
in patients with an aneurysm should be considered in surgical decisio
n-making and management.